Sm—Fe—N-based magnetic material and manufacturing method thereof
US11935676B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Sep 21, 2021 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Sep 21, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An Sm—Fe—N-based magnetic material according to the present disclosure includes a main phase having a predetermined crystal structure. The main phase has a composition represented by a molar ratio formula (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh (where, R1 is a predetermined rare earth element, M is a predetermined element, and 0≤x+y<0.04, 0≤z≤0.10, 0<p+q≤0.10, 0≤s≤0.10, and 2.9≤h≤3.1 are satisfied). A lattice volume of the main phase is 0.830 nm3 to 0.840 nm3, and a density of the main phase is 7.70 g/cm3 to 8.00 g/cm3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.